Because Trotsky had disagreed with Lenin, and even more with the followers of Stalin, in Russia after 1917, and was exiled and ultimately murdered by the Stalinists, he has been a vitally emotive symbol for extreme left-wing Marxist groups who wished...

Main article: Fourth International In 1938, Trotsky and the organisations that supported his outlook established the Fourth International. He said that only the Fourth International, basing itself on Lenin's theory of the vanguard party, could lead the...